package com.jcodecraeer.xrecyclerview.progressindicator;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.PorterDuff;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.support.v4.view.ViewCompat;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;

/**
 * Created by Administrator on 2016/4/26.
 */
public class DivierItemDecoration extends RecyclerView.ItemDecoration {
    private static final int[] ATTRS=new int[]{
            android.R.attr.listDivider
    };
    public static final int HORIZONTAL_LIST= LinearLayoutManager.HORIZONTAL;
    public static final int VERTICAL_LIST= LinearLayoutManager.VERTICAL;
    private Drawable mDivider;
    private int mOrientation;
    public DivierItemDecoration(Context context, int mOrientation){
        final TypedArray a=context.obtainStyledAttributes(ATTRS);
        mDivider=a.getDrawable(0);
        a.recycle();
        setOrientation(mOrientation);
    }
    public void setOrientation(int orientation){
        if (orientation!=HORIZONTAL_LIST&&orientation!= VERTICAL_LIST){
            throw new IllegalArgumentException("invalid orientation");
        }
        mOrientation=orientation;
    }

    @Override
    public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) {
        if (mOrientation==HORIZONTAL_LIST){
            drawHorizontal(c,parent);
        }else {
            drawVertical(c, parent);
        }
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
        if (mOrientation==VERTICAL_LIST){
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        }else {
            outRect.set(0,0,mDivider.getIntrinsicWidth(),0);
        }
    }
    public void drawHorizontal(Canvas c,RecyclerView parent){
        final int top=parent.getPaddingTop();
        final int bottom=parent.getHeight()-parent.getPaddingBottom();
        final int childCount=parent.getChildCount();

        for (int i=0;i<childCount-1;i++){
            View child=parent.getChildAt(i);
            RecyclerView.LayoutParams layoutParams= (RecyclerView.LayoutParams) child.getLayoutParams();
//            final int left=child.getLeft();
//            final int right=child.getRight()-left;
            final int left = child.getRight() + layoutParams.rightMargin +
                    Math.round(ViewCompat.getTranslationX(child));
            final int right = left + mDivider.getIntrinsicHeight();
            Log.d("xxxxx","left="+left+"  right="+right+"  top="+top+"  bottom="+bottom);
            Log.d("xxxxx","rightMargin:"+layoutParams.rightMargin+"  height:"+mDivider.getIntrinsicHeight());
            mDivider.setBounds(left, top, right, bottom);
            mDivider.setColorFilter(Color.GRAY, PorterDuff.Mode.SRC);
            mDivider.draw(c);
        }
    }
    public void drawVertical(Canvas c, RecyclerView parent) {
        final int left = parent.getPaddingLeft();
        final int right = parent.getWidth() - parent.getPaddingRight();

        final int childCount = parent.getChildCount();
        for (int i = 0; i < childCount-1; i++) {
            final View child = parent.getChildAt(i);
            final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                    .getLayoutParams();
            final int top = child.getBottom() + params.bottomMargin +
                    Math.round(ViewCompat.getTranslationY(child));
            final int bottom = top + mDivider.getIntrinsicHeight();
            mDivider.setBounds(left, top, right, bottom);
            mDivider.setColorFilter(Color.GRAY, PorterDuff.Mode.SRC);
            mDivider.draw(c);
        }
    }
    @Override
    public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {
        if (mOrientation == VERTICAL_LIST) {
            outRect.set(0, 0, 0, mDivider.getIntrinsicHeight());
        } else {
            outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
        }
    }
}
